:root {
    --optik-ink: #111111;
    --optik-charcoal: #2b2b2b;
    --optik-cream: #ffffff;
    --optik-accent: #ff6a2b;
    --optik-accent-dark: #e0531a;
    --optik-line: #ececec;
    --optik-secondary: #5a5a5a;
    --optik-success: #059669;
    --optik-error: #dc2626;
    --optik-warning: #d97706;
    --optik-muted: #d9d9d9;
    --optik-font-heading: "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
    --optik-font-body: "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    background-color: var(--optik-cream);
    color: var(--optik-ink);
    font-family: var(--optik-font-body);
    font-size: 16px;
    line-height: 1.5;
}

/* Accessibility: Focus states */
:focus-visible {
    outline: 3px solid var(--optik-accent);
    outline-offset: 2px;
}

a:focus-visible {
    outline: 3px solid var(--optik-accent);
    outline-offset: 2px;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--optik-accent);
    outline-offset: 2px;
}

/* Accessibility: Reduced motion respect */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

h1, h2, h3, h4, h5, h6,
.optik-section-title, .navbar-brand, .optik-hero h1, .optik-banner-caption h2 {
    font-family: var(--optik-font-heading);
}

a {
    color: var(--optik-accent-dark);
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.optik-container-wide { max-width: 1140px; }
@media (min-width: 1200px) { .optik-container-wide { max-width: 1360px; } }
@media (min-width: 1440px) { .optik-container-wide { max-width: 1600px; } }
@media (min-width: 1700px) { .optik-container-wide { max-width: 1840px; } }

.optik-navbar-logo {
    max-height: 42px;
    width: auto;
    display: block;
}

@media (min-width: 992px) {
    .optik-navbar-center {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        margin: 0 !important;
    }
}

.optik-brand-logo {
    max-height: 56px;
    width: auto;
    object-fit: contain;
}

.btn-optik {
    background-color: var(--optik-ink);
    color: #fff;
    border: none;
    padding: 0.6rem 1.4rem;
    letter-spacing: 0.03em;
}
.btn-optik:hover { background-color: var(--optik-accent-dark); color: #fff; }

.btn-outline-optik {
    border: 1px solid var(--optik-ink);
    color: var(--optik-ink);
    background: transparent;
}
.btn-outline-optik:hover { background-color: var(--optik-ink); color: #fff; }

.btn-whatsapp {
    background-color: #25d366;
    color: #fff;
    border: none;
    padding: 0.6rem 1.4rem;
    letter-spacing: 0.02em;
}
.btn-whatsapp:hover { background-color: #1da851; color: #fff; }
.btn-whatsapp svg { flex: 0 0 auto; }

.optik-hero {
    background: linear-gradient(135deg, var(--optik-ink) 0%, var(--optik-charcoal) 50%, var(--optik-accent-dark) 100%);
    color: #fff;
    padding: 5rem 2rem;
    position: relative;
    overflow: hidden;
}

.optik-hero::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, color-mix(in srgb, var(--optik-accent) 22%, transparent) 0%, transparent 70%);
    pointer-events: none;
}

.optik-hero .container,
.optik-hero h1,
.optik-hero p {
    position: relative;
    z-index: 2;
}

.optik-hero h1 { font-weight: 300; font-size: 2.6rem; letter-spacing: 0.02em; text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.optik-hero p { color: #e8e3d8; font-size: 1.1rem; }

.optik-banner-carousel { background: var(--optik-ink); }
.optik-banner-carousel .carousel-item { position: relative; }
.optik-banner-img {
    width: 100%;
    aspect-ratio: 12 / 5;
    object-fit: cover;
}
.optik-banner-scrim {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255,255,255,.9) 0%, rgba(255,255,255,.55) 40%, rgba(255,255,255,0) 68%);
}
@media (max-width: 767px) {
    .optik-banner-img { aspect-ratio: 4 / 5; }
    .optik-banner-scrim { background: linear-gradient(0deg, rgba(255,255,255,.92) 0%, rgba(255,255,255,.55) 45%, rgba(255,255,255,0) 70%); }
}
.optik-banner-caption {
    left: 6%;
    right: auto;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
    max-width: 46%;
    text-align: left;
    text-shadow: none;
    color: var(--optik-ink);
}
@media (max-width: 767px) {
    .optik-banner-caption { max-width: 88%; top: auto; bottom: 1.5rem; transform: none; }
}
.optik-banner-caption h2 { font-weight: 700; font-size: 1.7rem; line-height: 1.1; letter-spacing: -0.01em; color: var(--optik-ink); }
@media (min-width: 768px) { .optik-banner-caption h2 { font-size: 2.6rem; } }
.optik-banner-caption p { color: var(--optik-charcoal); margin-top: .5rem; }
.optik-banner-cta {
    display: inline-block;
    margin-top: 1.3rem;
    background: var(--optik-accent-dark);
    color: #fff;
    padding: .8rem 2.1rem;
    border-radius: 999px;
    font-weight: 600;
    letter-spacing: .02em;
    text-decoration: none;
    box-shadow: 0 12px 24px -8px color-mix(in srgb, var(--optik-accent) 55%, transparent);
    transition: transform .15s ease, box-shadow .15s ease;
}
.optik-banner-cta:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 16px 28px -6px color-mix(in srgb, var(--optik-accent) 60%, transparent); }

.optik-banner-carousel .carousel-control-prev,
.optik-banner-carousel .carousel-control-next {
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
    width: 2.75rem;
    height: 2.75rem;
    background: rgba(255,255,255,.88);
    border-radius: 50%;
    opacity: 1;
}
.optik-banner-carousel .carousel-control-prev { left: 1.25rem; }
.optik-banner-carousel .carousel-control-next { right: 1.25rem; }
.optik-banner-carousel .carousel-control-prev:hover,
.optik-banner-carousel .carousel-control-next:hover { background: #fff; }
.optik-banner-carousel .carousel-control-prev-icon,
.optik-banner-carousel .carousel-control-next-icon {
    width: 1rem;
    height: 1rem;
}
.optik-banner-carousel .carousel-control-prev-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231b1f24'%3E%3Cpath d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'/%3E%3C/svg%3E");
}
.optik-banner-carousel .carousel-control-next-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231b1f24'%3E%3Cpath d='M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
}
.optik-banner-carousel .carousel-indicators [data-bs-target] {
    width: 1.6rem;
    height: .2rem;
    border-radius: 2px;
    background-color: rgba(255,255,255,.65);
    border: 1px solid rgba(27,31,36,.2);
    opacity: 1;
}
.optik-banner-carousel .carousel-indicators .active { background-color: #fff; border-color: var(--optik-ink); }

.optik-popup-content { border: none; border-radius: 0.5rem; overflow: hidden; }
.optik-popup-img { aspect-ratio: 16 / 9; object-fit: cover; }
.optik-popup-content h4 { font-weight: 300; letter-spacing: 0.02em; }

.optik-section-title {
    font-weight: 300;
    letter-spacing: 0.04em;
    margin-bottom: 1.75rem;
    text-transform: uppercase;
    font-size: 1.1rem;
    color: var(--optik-charcoal);
}

.optik-home-section-title {
    font-family: var(--optik-font-heading);
    text-transform: none;
    text-align: center;
    font-weight: 600;
    font-size: 1.85rem;
    letter-spacing: 0.01em;
    color: var(--optik-ink);
    margin-bottom: 0;
}
.optik-home-section-title::after {
    content: '';
    display: block;
    width: 54px;
    height: 3px;
    background: var(--optik-accent);
    border-radius: 2px;
    margin: 0.9rem auto 2rem;
}
@media (max-width: 767px) {
    .optik-home-section-title { font-size: 1.5rem; }
}

.optik-card {
    background: #fff;
    border: 1px solid var(--optik-line);
    transition: box-shadow .15s ease, transform .15s ease;
}
.optik-card:hover { box-shadow: 0 10px 24px rgba(27,31,36,.08); transform: translateY(-2px); }

/* Tam genislik ozel bolum: hucreler kenar bosluksuz (g-0) dizildiginde kart kenarligi/golgesi kaldirilir. */
.optik-card-flush { border: none; }
.optik-card-flush:hover { box-shadow: none; transform: none; }

.optik-newsletter-section {
    background: linear-gradient(135deg, var(--optik-ink), var(--optik-charcoal));
    color: #fff;
}
.optik-newsletter-title {
    font-family: var(--optik-font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: .5rem;
}
.optik-newsletter-subtitle {
    color: #d8d3c8;
    margin-bottom: 1.5rem;
}
.optik-newsletter-note {
    color: #a9a297;
    font-size: .8rem;
    margin: 1rem 0 0;
}
.optik-newsletter-note a { color: var(--optik-accent); }

.optik-product-card { position: relative; overflow: hidden; }

.optik-quick-add {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 0.6rem;
    background: linear-gradient(to top, rgba(255,255,255,.97) 55%, rgba(255,255,255,0));
    opacity: 0;
    transform: translateY(8px);
    transition: opacity .15s ease, transform .15s ease;
    pointer-events: none;
}
.optik-product-card:hover .optik-quick-add {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.optik-filter-sidebar .list-unstyled a.active,
.optik-filter-sidebar .list-unstyled a.fw-bold {
    color: var(--optik-ink) !important;
}

.optik-product-thumb {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    background: #eee9e0;
}

.optik-placeholder-thumb {
    width: 100%;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #eee9e0, #ddd5c7);
    color: #8a7d67;
    font-size: 0.8rem;
    text-align: center;
    padding: 1rem;
}

.optik-price-old { text-decoration: line-through; color: #9a9284; font-size: .85rem; }
.optik-price-new { font-weight: 600; }

footer.optik-footer {
    background-color: var(--optik-ink);
    color: #cfc9bd;
    padding: 3rem 0 1.5rem;
}
footer.optik-footer a { color: #e7e2d8; text-decoration: none; }
footer.optik-footer a:hover { text-decoration: underline; }
footer.optik-footer h6 { color: #fff; text-transform: uppercase; letter-spacing: .05em; font-size: .85rem; }

.optik-social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.08);
    color: #e7e2d8 !important;
    text-decoration: none !important;
    transition: background-color .15s, color .15s;
}
.optik-social-icon:hover {
    background-color: var(--optik-accent, #ff6a2b);
    color: #fff !important;
}

.optik-badge-soft {
    background-color: var(--optik-line);
    color: var(--optik-charcoal);
}

.optik-carousel { position: relative; }
.optik-carousel-track {
    display: flex;
    gap: .75rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -ms-overflow-style: none;
    scrollbar-width: none;
    padding: .25rem .1rem .5rem;
}
.optik-carousel-track::-webkit-scrollbar { display: none; }
.optik-carousel-track > * { scroll-snap-align: start; flex: 0 0 auto; }

.optik-carousel-nav {
    position: absolute;
    top: 40%;
    transform: translateY(-50%);
    width: 2.6rem;
    height: 2.6rem;
    border-radius: 50%;
    background: #fff;
    border: 1px solid var(--optik-line);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 16px rgba(27,31,36,.12);
    color: var(--optik-ink);
    z-index: 2;
    padding: 0;
}
.optik-carousel-nav:hover { background: var(--optik-ink); color: #fff; border-color: var(--optik-ink); }
.optik-carousel-prev { left: -.5rem; }
.optik-carousel-next { right: -.5rem; }
@media (max-width: 767px) { .optik-carousel-nav { display: none; } }

.optik-carousel-item-product { width: calc((100% - 3 * .75rem) / 4); min-width: 190px; }
@media (max-width: 860px) { .optik-carousel-item-product { width: calc((100% - .75rem) / 2); min-width: 160px; } }

.optik-carousel-track-2row {
    display: grid;
    grid-auto-flow: column;
    grid-template-rows: repeat(2, auto);
    grid-auto-columns: calc((100% - 3 * .75rem) / 4);
}
@media (max-width: 860px) { .optik-carousel-track-2row { grid-auto-columns: calc((100% - .75rem) / 2); } }
/* Grid sutun genisligi zaten grid-auto-columns ile belirleniyor; karta ayrica
   yuzde tabanli width vermek (grid hucresinin genisligine gore) genisligi ikinci
   kez daraltir. Grid icindeki kart bu yuzden hucreyi oldugu gibi doldurmali. */
.optik-carousel-track-2row .optik-carousel-item-product { width: 100%; min-width: 0; }

.optik-carousel-item-brand {
    width: calc((100% - 5 * .75rem) / 6);
    min-width: 130px;
    height: 92px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border: 1px solid var(--optik-line);
    border-radius: 0.25rem;
    padding: 0.5rem 1rem;
    text-align: center;
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.optik-carousel-item-brand:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(27,31,36,.1);
    border-color: var(--optik-accent-dark);
}
@media (max-width: 860px) { .optik-carousel-item-brand { width: calc((100% - 2 * .75rem) / 3); } }

.optik-post-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3px;
}
@media (max-width: 767px) {
    .optik-post-grid { grid-template-columns: repeat(2, 1fr); }
}
.optik-post-card {
    position: relative;
    display: block;
    overflow: hidden;
    color: #fff;
}
.optik-post-thumb {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    display: block;
    transition: transform .5s ease;
}
.optik-post-card:hover .optik-post-thumb { transform: scale(1.06); }
.optik-about-section--text-only { max-width: 760px; margin: 0 auto; text-align: center; }
.optik-about-section:not(.optik-about-section--text-only) { max-width: 1160px; margin: 0 auto; }
.optik-about-body { color: var(--optik-charcoal); line-height: 1.7; margin-bottom: 1rem; }
.optik-about-image { width: 100%; height: 380px; object-fit: cover; }

.optik-product-card {
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.optik-product-card:hover {
    box-shadow: 0 14px 34px color-mix(in srgb, var(--optik-accent) 22%, transparent);
    transform: translateY(-4px);
}

.optik-product-image-wrapper {
    position: relative;
    overflow: hidden;
    width: 100%;
    aspect-ratio: 1 / 1;
}

.optik-product-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.optik-product-link:hover .optik-product-thumb {
    transform: scale(1.12);
}

.optik-product-thumb-hover {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.35s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.optik-product-link:hover .optik-product-thumb-hover {
    opacity: 1;
    transform: scale(1.12);
}

.optik-whatsapp-widget {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 999;
}

.optik-whatsapp-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #25d366;
    color: white;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.optik-whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.optik-whatsapp-btn svg {
    display: block;
}

@media (max-width: 576px) {
    .optik-whatsapp-widget {
        bottom: 5.5rem;
        right: 1rem;
    }
    .optik-whatsapp-btn {
        width: 50px;
        height: 50px;
    }
    .optik-whatsapp-btn svg {
        width: 20px;
        height: 20px;
    }

    body {
        padding-bottom: 70px;
    }
}

.optik-mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--optik-line);
    z-index: 990;
    height: 70px;
}

@media (max-width: 576px) {
    .optik-mobile-nav {
        display: flex;
    }
}

.optik-mobile-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    text-decoration: none;
    color: var(--optik-secondary);
    font-size: 0.75rem;
    padding: 0.5rem;
    transition: color 0.2s ease;
}

.optik-mobile-nav-item:hover,
.optik-mobile-nav-item.active {
    color: var(--optik-accent);
}

.optik-mobile-nav-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.optik-post-caption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 0.75rem;
    font-size: 0.85rem;
    font-weight: 500;
    background: linear-gradient(to top, rgba(0,0,0,.65), rgba(0,0,0,0));
}


/* ===== Canli / modern katman (beyaz zemin, siyah metin, tek canli vurgu) ===== */
.btn-optik { background-color: var(--optik-accent); border-radius: 999px; font-weight: 600; padding: .65rem 1.6rem; }
.btn-optik:hover, .btn-optik:focus { background-color: var(--optik-accent-dark); color: #fff; }
.btn-outline-optik { border-radius: 999px; font-weight: 600; border-width: 2px; }
.btn-outline-optik:hover { background-color: var(--optik-ink); border-color: var(--optik-ink); }

.optik-section-title { font-weight: 700; letter-spacing: .06em; }
.optik-home-section-title { font-weight: 800; letter-spacing: -.01em; font-size: 2rem; }
.optik-home-section-title::after { width: 64px; height: 4px; border-radius: 4px; }
@media (max-width: 767px) { .optik-home-section-title { font-size: 1.6rem; } }

.navbar { background: #fff !important; border-bottom-color: var(--optik-line) !important; }
.navbar .nav-link { font-weight: 600; letter-spacing: .02em; }
.navbar .nav-link:hover { color: var(--optik-accent); }

.optik-card { border: none; border-radius: 16px; overflow: hidden; box-shadow: 0 2px 14px rgba(17, 17, 17, .07); }
.optik-card-flush { border-radius: 0; box-shadow: none; }
.optik-product-image-wrapper { background: #f5f5f5; }
.optik-price-new { font-weight: 800; color: var(--optik-accent-dark) !important; }
.optik-price-old { color: #9b9b9b; }

.optik-sale-badge {
    position: absolute; top: .7rem; left: .7rem; z-index: 3;
    background: var(--optik-accent); color: #fff;
    font-size: .75rem; font-weight: 800; letter-spacing: .02em;
    padding: .25rem .6rem; border-radius: 999px;
    box-shadow: 0 6px 14px -4px color-mix(in srgb, var(--optik-accent) 65%, transparent);
}

.optik-carousel-item-brand { border-radius: 14px; border-color: transparent; box-shadow: 0 2px 10px rgba(17, 17, 17, .06); }
.optik-carousel-item-brand:hover { border-color: var(--optik-accent); }

.optik-banner-cta { background: var(--optik-accent); }
.optik-banner-caption h2 { font-weight: 800; }

.optik-newsletter-section { background: linear-gradient(135deg, var(--optik-ink), var(--optik-accent-dark)); }
footer.optik-footer { background-color: var(--optik-ink); }
footer.optik-footer a:hover { color: var(--optik-accent); }